diff --git a/lib/crewai/src/crewai/a2a/utils/delegation.py b/lib/crewai/src/crewai/a2a/utils/delegation.py
index 856e7ff65..da869c6d0 100644
--- a/lib/crewai/src/crewai/a2a/utils/delegation.py
+++ b/lib/crewai/src/crewai/a2a/utils/delegation.py
@@ -589,8 +589,9 @@ async def _aexecute_a2a_delegation_impl(
 
     # If the user hasn't explicitly configured an updates strategy and the remote
     # agent advertises that it does not support streaming, fall back to polling.
-    if updates is None and not (
-        agent_card.capabilities and agent_card.capabilities.streaming
+    if updates is None and (
+        agent_card.capabilities is not None
+        and agent_card.capabilities.streaming is False
     ):
         logger.debug(
             "Remote agent does not support streaming; falling back to PollingHandler",
diff --git a/lib/crewai/tests/a2a/utils/test_delegation.py b/lib/crewai/tests/a2a/utils/test_delegation.py
index b09c483d1..6079707bb 100644
--- a/lib/crewai/tests/a2a/utils/test_delegation.py
+++ b/lib/crewai/tests/a2a/utils/test_delegation.py
@@ -155,6 +155,25 @@ class TestStreamingFallback:
         mock_streaming.assert_called_once()
         mock_polling.assert_not_called()
 
+    @pytest.mark.asyncio
+    async def test_uses_streaming_when_agent_card_streaming_is_none(self) -> None:
+        """When streaming is unset (None) and updates is None, StreamingHandler should be used."""
+        agent_card = _make_agent_card(streaming=None)
+
+        with ExitStack() as stack:
+            for p in _make_shared_patches(agent_card):
+                stack.enter_context(p)
+            mock_polling = stack.enter_context(
+                patch.object(PollingHandler, "execute", new=AsyncMock(return_value=_TASK_RESULT))
+            )
+            mock_streaming = stack.enter_context(
+                patch.object(StreamingHandler, "execute", new=AsyncMock(return_value=_TASK_RESULT))
+            )
+            await _call_impl(agent_card, updates=None)
+
+        mock_streaming.assert_called_once()
+        mock_polling.assert_not_called()
+
     @pytest.mark.asyncio
     async def test_explicit_streaming_config_overrides_agent_card(self) -> None:
         """Explicitly passing StreamingConfig keeps StreamingHandler even when agent card says no streaming."""